Sandeep More created KNOX-1391:
----------------------------------

             Summary: IllegalStateException when accessing Admin UI
                 Key: KNOX-1391
                 URL: https://issues.apache.org/jira/browse/KNOX-1391
             Project: Apache Knox
          Issue Type: Bug
          Components: KnoxSSO
            Reporter: Sandeep More
            Assignee: Sandeep More
             Fix For: 1.1.0


When trying to access Admin UI, java.lang.IllegalStateException is thrown on 
redirect.
{code:java}
2018-07-19 10:53:19,763 ERROR knox.gateway (GatewayServlet.java:doFilter(180)) 
- Gateway processing failed: java.lang.IllegalStateException: Committed
java.lang.IllegalStateException: Committed
    at org.eclipse.jetty.server.Response.resetBuffer(Response.java:1242)
    at org.eclipse.jetty.server.Response.resetForForward(Response.java:1234)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:132)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:72)
    at org.eclipse.jetty.servlet.DefaultServlet.doGet(DefaultServlet.java:588)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
    at 
org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:201)
    at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.apache.knox.gateway.GatewayServlet.doFilter(GatewayServlet.java:172)
    at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
    at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
    at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
    at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.apache.knox.gateway.trace.TraceHandler.handle(TraceHandler.java:51)
    at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at 
org.apache.knox.gateway.filter.CorrelationHandler.handle(CorrelationHandler.java:41)
    at org.eclipse.jetty.servlets.gzip.GzipHandler.handle(GzipHandler.java:479)
    at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at 
org.apache.knox.gateway.filter.PortMappingHelperHandler.handle(PortMappingHelperHandler.java:152)
    at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
    at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:499)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
    at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:258)
    at 
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
    at java.lang.Thread.run(Thread.java:748){code}



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